PUKY, lightweight and stable, bicycle training wheels. The training wheels are easy to install, lightweight and stable. We recommend that you use them only for a short period of time to ensure safety at the very beginning. However, children should not get used to the unnatural ride and handling. Suitable for 16“ and 18“ inch PUKY bicycles: PUKY CYKE, YOUKE MODELS AND WOOM DOUBLE BIKES RETIRED UNTIL 2024;